JP2003130886A - Rotating direction detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a compact rotating direction detecting device with a simple constitution and to detect the rotating direction of a rotor by simple processing. SOLUTION: This rotating direction detecting device 60 is used in detecting the rotating direction of a pulley 55 rotatably mounted on a chain guide 52, and comprises a rotation sensor 29, a detection element 61 and a cutoff mechanism 62. The rotation sensor is fixed to the chain guide. The detection element is mounted on the pulley in a state of being detected by the rotation sensor. The cutoff mechanism has a cutoff arm 65 mounted on a fixed body movably between a cutoff position where the rotation sensor can not detect the detection element, and a detecting position separated from the cutoff position to allow the rotation sensor to detect the detection element, an interlocking member 66 for moving the cutoff arm to move in interlocking with the rotation of the pulley in the first direction and the rotation in the second direction opposite to the first direction, and a positioning projection 67 for positioning the cutoff arm moved by the interlocking member 66 to the cutoff position and the detecting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation direction detecting device, and more particularly to a rotation direction detecting device for detecting the rotation direction of a rotating body rotatably mounted on a fixed body.

[0002]

2. Description of the Related Art In order to allow a bicycle to perform a gear shifting operation with a light force, an electric transmission apparatus has recently been developed which can shift a bicycle using an actuator. In the case of the external transmission, since the chain is derailed between a plurality of gears to change gears, the gear can be changed only when the chain is normally rotating, that is, when the pedal is depressed in the traveling direction. Therefore, in order to electrify the gear shifting operation of the external transmission, a rotation direction detection device that can detect whether or not the pedal is stepped in the traveling direction is required.

Conventionally, this type of rotation direction detecting device is provided with a detector fixed to the crank of the bicycle, for example, a magnet, and a pair of reed switches for detecting the magnetic force of the detector and turning it on and off. The pair of reed switches are arranged side by side in the rotation direction. Depending on which of the pair of magnets arranged in this rotation direction is turned on or off first,
The rotation direction of the crank is detected to detect whether or not the pedal is stepped on in the traveling direction.

[0004]

In the conventional rotation direction detecting device, since the rotation direction is detected by using a pair of reed switches, the structure of the device becomes complicated and
The process for detecting the rotation direction becomes complicated. In addition, since it is necessary to dispose the two reed switches at intervals in the rotation direction, this tends to be an obstacle to downsizing.

An object of the present invention is to enable a rotation direction detecting device to realize a compact and simple structure and to detect the rotation direction of a rotating body by a simple process.

[0006]

A rotation direction detecting device according to a first aspect of the present invention is a device for detecting the rotation direction of a rotating body rotatably mounted on a fixed body, the contactless detecting means and the detecting means. It has a child and a blocking means. The non-contact detecting means is fixed to the fixed body. The detector is attached to the rotating body so that the non-contact detecting means can detect it. The blocking means is a blocking body which is mounted on a fixed body so as to be movable between a blocking position where the non-contact detecting means cannot detect the detector and a blocking position where the non-contact detecting means can detect the detector, Interlocking means for moving the blocking body in conjunction with rotation of the rotating body in the first direction and the opposite second direction, and positioning means for positioning the blocking body moved by the interlocking means between the blocking position and the detection position. Have

In this rotation detecting device, when the rotating body rotates in the first direction, the blocking body rotates in the first direction in conjunction with it and is positioned at, for example, the blocking position. As a result, the non-contact detecting means cannot detect the detector. On the other hand, when the rotating body rotates in the second direction, the blocking body rotates in the second direction in conjunction with this, and is positioned at the detection position, for example. As a result, the non-contact detecting means can detect the detector, and it can be seen that the rotating body has rotated in the second direction. Here, by setting the non-contact detection means in the detectable state and the non-detectable state by the blocking body, the rotation of the rotating body in the second direction can be detected by one non-contact detection means. It can be realized with a compact and simple structure. Also,
Since it suffices to process the signal from one non-contact detecting means, the rotation direction of the rotating body can be detected by a simple process.

A rotation detecting device according to a second aspect of the present invention is the device according to the first aspect, wherein the fixed body is a component relating to the bicycle, and the rotating body rotates in conjunction with the crank of the bicycle. In this case, the rotation of the crank of the bicycle in the traveling direction can be easily detected, which facilitates control of the external transmission. A rotation detecting device according to a third aspect of the present invention is the device according to the first or second aspect, wherein the non-contact detecting means is a reed switch that is turned on and off by magnetism, and the detector is a magnet. In this case, the reed switch can be used to easily detect the rotation direction.

A rotation detecting device according to a fourth aspect of the present invention is the device according to the third aspect, wherein the blocking body blocks the magnetism emitted from the detector. In this case, it is possible to disable the detection of the detector by the reed switch by cutting off the magnetism from the detector by the breaker. A rotation direction detecting device according to a fifth aspect of the present invention is the device according to any one of the first to fourth aspects, wherein the blocking body is mounted on the fixed body so as to be rotatable about the axis of the rotating body, and the interlocking means includes the rotating body and the blocking body. And are connected by frictional force. In this case, since the blocking body is only connected to the rotating body by frictional force, if the blocking body is positioned when the rotating body rotates, the blocking body will continue to rotate even if the rotating body continues to rotate. It becomes possible to stop at the position.

A rotation direction detecting device according to a sixth aspect of the invention is the first aspect of the invention.
In the device according to any one of 1 to 5, the positioning means is provided on the fixed body, and the blocking body is arranged between the non-contact detecting means and the detector when the rotating body rotates in the first direction. The stopper member positions the blocking body with the position as the blocking position, and positions the blocking body at the detection position when the rotating body rotates in the second direction. In this case, the first
The blocking body can be positioned at the blocking position and the detection position only by fixing the non-contact detection means to the fixed body when the blocking body hits the stopper member when the blocking body rotates in the direction. Therefore, the blocking body can be positioned with a simple configuration, and the configuration of the blocking means is simplified.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION <Structure> In FIG. 1, a bicycle 1 adopting an embodiment of the present invention is a mountain bike type sports car, and its main parts are a frame 2, a front fork 3, a handle 4, a front wheel. 5, a rear wheel 6, a chain 7, a front exterior transmission 8, and a rear exterior transmission 9.

The frame 2 serves as a base of the bicycle 1, and includes a front fork 3 at the front, a front exterior transmission 8 at the lower center, a rear wheel 6 and a rear exterior transmission 9 at the rear.
It has and. Further, a saddle 11 on which a rider sits is provided at the upper center of the frame 2. The front fork 3 is a member mounted on the front portion of the frame 2 so as to be swingable around an axis that is inclined. A handle 4 is attached to the upper portion of the front fork 3, and a front wheel 5 is attached to the lower portion.

As shown in FIG. 2, grips 12a and 12b and a brake lever 1 are provided at both ends of the handle 4, respectively.
3a and 13b are provided. Further, in the handle 4, the grips 12 a and 12 b and the brake lever 1
Gear shift operation parts 14a and 14b are provided inside 3a and 13b. Further, a gear shift control device 15 is attached to the center of the handle 4, and the gear shift control device 15 is connected to the gear shift operation parts 14a and 14b.

The brake levers 13a and 13b are for operating the front wheel 5 and the rear wheel 6, respectively, and the brake levers 13a and 13b are the front wheel brakes 1 to be described later.
6 and rear wheel brakes 17, respectively. The gear shift operation units 14a and 14b are used for gear shifting operations of the front exterior transmission 8 and the rear exterior transmission 9.
The shift operation portion 14a is provided with a front upper shift button 18a and a front lower shift button 19a, and the shift operation portion 14b is provided with a rear upper shift button 18b and a rear lower shift button 19b. Up shift buttons 18a, 18 respectively
b outputs a shift signal to the shift control device 15 for shifting (shifting up) the shift speed (described later) of each of the exterior transmissions 8 and 9 by one step. Similarly, each downshift button 19
Reference characters a and 19b output a shift signal to the shift control device 15 to shift (shift down) the shift speed of each of the external transmission devices 8 and 9 to the next lower speed.

The shift control device 15 includes a shift operating portion 14a,
This is for gear shift control of the front exterior transmission 8 and the rear exterior transmission 9 in accordance with the output of the shift signal at 14b. As shown in FIG. 3, the shift control device 15 includes a control unit 2 including a CPU 21 and a memory 22.
3, a display unit 24 for displaying the current gear and the like, a power switch 25, and a mode switch 26. The control unit 23 controls the shift control device 15 by the CPU 21 according to the storage of the memory 22. A display unit 24, a power switch 25, and a mode switch 26 are connected to the control unit 23, and each shift button 18a,
18b, 19a, 19b, the connection part 28, and the rotation sensor 29 are connected. The connecting portion 28 is provided for each derailleur 3 of the front exterior transmission 8 and the rear exterior transmission 9.
A signal for driving 3, 42 (described later) is generated and output according to the shift signal. The rotation sensor 29 includes the cranks 35 and 36.
It detects whether or not (described later) is rotating in the traveling direction, and is attached to the rear derailleur 42.

The mode switch 26 changes the mode of the shift control device 15. Here, the automatic switch mode and the manual shift mode can be selected by operating the mode switch 26. Here, the automatic shift mode is for determining the optimum shift stage according to the vehicle speed. In the automatic shift mode, the front exterior transmission 8 and the rear exterior transmission 9 are controlled by the shift-up threshold and the shift-down threshold set in advance according to the gear position. Further, in the manual shift mode, the front exterior transmission 8 and the rear exterior transmission 9 are controlled according to the operation of the shift operation parts 14a and 14b.

The shift control device 15 includes a box-shaped control case 2
7, the display unit 24, the power switch 25,
And the mode switch 26 is disposed on the upper surface thereof.
Further, the shift control device 15 is connected to the front exterior transmission 8 and the rear exterior transmission 9 via a connecting portion 28. A hub portion of the front wheel 5 is attached to a lower portion of the front fork 3, and a front wheel brake 16 for braking the front wheel 5 is provided on an upper portion thereof. A hub portion of the rear wheel 6 is attached to a rear portion of the frame 2, and a rear exterior transmission 9 is further attached to the hub portion. Further, the rear wheel 6 is provided with a rear wheel brake 17 for braking the rear wheel on the upper part.

The chain 7 is mounted on the front exterior transmission 8 and the rear exterior transmission 9 and transmits the driving force from the front exterior transmission 8 to the rear exterior transmission 9. The front exterior transmission 8 is the frame 2
Is a mechanism unit that is attached to the lower center of the vehicle and transmits the driving force by the runner to the rear exterior transmission 9 via the chain 7. The front exterior transmission 8 has two large and small sprockets 37 and a front derailleur 33.

The two sprockets 37 have a crank portion 31.
Is attached to. The crank portion 31 is rotated by the rider depressing the pedals 32a and 32b. The crank portion 31 includes a crank shaft 34, a right crank 35, and a left crank 36. Crankshaft 34
Are arranged in the left-right direction at the lower center of the frame 2 and are rotatably mounted on the frame 2. The right crank 35
One end is connected to the right side of the crankshaft 34, and the two sprockets 37 are fixed to the right crank 35. One end of the left crank 36 is connected to the left side of the crank shaft 34. Pedals 32a and 32b are rotatably attached to the radially outer ends which are the other ends of the right crank 35 and the left crank 36, respectively.

The front derailleur 33 is for hanging the chain 7 on one of the two sprockets 37, and can be moved by a solenoid (not shown). Further, the front derailleur 33 is provided with the shift control device 15
Move under the control of. The front derailleur 33
Can detect the current position of the shift stage by a shift position sensor (not shown).

The rear exterior transmission 9 is mounted on the periphery of the hub portion of the rear wheel 6 and is a mechanism for transmitting the driving force transmitted by the chain 7 to the rear wheel 6. The rear exterior transmission 9 is composed of a rear sprocket wheel 41 and a rear derailleur 42. Further, the rear derailleur 42 operates under the control of the shift control device 15.
The rear derailleur 42 can detect the current gear position by a gear shift position sensor (not shown).

The rear sprocket wheel 41 comprises seven large and small sprockets 43a-4 arranged side by side in the axial direction.
It consists of 3g, and the sprockets 43a-43g are
It is attached concentrically to the hub portion of the rear wheel 6.
The rear derailleur 42 is for hanging the chain 7 on one of the seven sprockets 43a to 43g, and can be moved by a motor (not shown).

The rear derailleur 42 is, as shown in FIG. 4, a base member 50 attached to the rear end of the frame 2.
A movable member 51 disposed at a distance from the base member 50, a chain guide 52 swingably mounted on the movable member 51, and a link mechanism 53 connecting the base member 50 and the movable member 51. Have A drive motor and a positioning mechanism (not shown) are housed in the base member 50 to position the movable member 51 and the chain guide 52 with respect to the sprockets 43a to 43g.

A pulley 54 is rotatably mounted on the movable member 51. The movable member 51 biases the chain guide 52 clockwise in FIG. 4 in order to apply tension to the chain 7. The link mechanism 53 is for parallelly moving the chain guide 52 in the axial direction of the hub portion, and has a parallel four-link structure. The link mechanism 53 is biased in the direction of the small diameter sprocket 43g. The chain guide 52 is composed of two plate-shaped members, and a pulley 55 is rotatably attached to the tip thereof. Pulley 55
Is a fixed shaft 56 attached to the tip of the chain guide 52.
(Fig. 6) is rotatably mounted.

The rear derailleur 42 includes a crank 35,
A rotation direction detection device 60 for detecting the rotation of the 36 in the traveling direction is attached. As shown in FIGS. 5 and 6, the rotation direction detection device 60 includes a rotation sensor 29 fixed to the chain guide 52, a detector 61 mounted on a pulley so that the rotation sensor 29 can detect the rotation sensor 29, and a rotation sensor 29. It has a shutoff mechanism 62 that outputs the output only when the crank rotates in the traveling direction. The rotation sensor 29 uses a reed switch that is turned on and off by magnetism, for example. The detector 61 has a magnet fixed to the outer peripheral portion of the pulley 55, and when the detector 61 passes a position facing the rotation sensor 29, the rotation sensor 29 outputs a pulse.

The blocking mechanism 62 includes a blocking arm 65, a first direction A of the pulley 55 (opposite to the rotation direction of the crank advancing direction) and an opposite second direction B (rotation direction of the crank advancing direction). It has an interlocking member 66 that rotates the blocking arm 65 in conjunction with rotation, and a positioning protrusion 67 that positions the blocking arm 65 moved by the interlocking member 66 between the blocking position and the detection position.

The blocking arm 65 is separated from the blocking position where the rotation sensor 29 cannot detect the detector 61 (the position facing the rotation sensor 29 shown by the two-dot chain line in FIG. 5) and the blocking position, and the rotation sensor 29 detects the detector. 61 is attached to the chain guide 52 so as to be rotatable at a detection position where 61 can be detected. The blocking arm 65 is a plate-shaped member made of, for example, aluminum that blocks magnetism, and is rotatably mounted on the fixed shaft 56 side by side with the pulley 55. As a result, the blocking arm 65
Can be arranged between the detector 61 and the rotation sensor 29.

The interlocking member 66 is mounted between the pulley 55 and the blocking arm 65 so as to come into contact therewith, and connects the both by a frictional force. Therefore, when the blocking arm 65 is positioned by the positioning protrusion 67, the interlocking member 66 slides with the blocking arm 65. As described above, since the blocking arm 65 is only connected to the pulley 55 by the frictional force, if the blocking arm 65 is positioned when the pulley 55 rotates, the blocking arm 65 will continue to rotate even if the pulley 55 continues to rotate. Can be stopped at that position.

The positioning protrusion 67 is provided on the chain guide 52.
It is integrally formed with. The positioning protrusion 67 is the pulley 5
When the 5 rotates in the first direction A, the blocking arm 65 is positioned with the rotation position where the blocking arm 65 is arranged between the rotation sensor 29 and the detector 61 as the blocking position, and the pulley 55 moves in the second direction B. The blocking arm 65 is positioned at the detection position when rotated. Thus, the first direction A
When the blocking arm 65 rotates, the rotation sensor 29 is attached to the chain guide 52 when it hits the positioning protrusion 67.
The blocking arm 65 can be positioned between the blocking position and the detection position only by fixing the blocking arm 65 to. Therefore, the blocking arm 65 can be positioned with a simple configuration, and the configuration of the blocking mechanism 62 is simplified.

In the rotation direction detecting device 60 having such a structure, for example, the pedals 32a and 32b are stepped on the side opposite to the traveling direction, and as shown in FIGS.
When 5 rotates in the first direction A, the blocking arm 65 also rotates in the same direction by the action of the interlocking member 66, and the blocking arm 65 is rotated.
Is positioned by the positioning protrusion 67 at the blocking position shown in FIG. The cutoff position is a position facing the rotation sensor 29. At this time, since the interlocking member 66 only connects the pulley 55 and the blocking arm 65 by a frictional force, the pulley 55 continues to rotate even if the blocking arm 65 is positioned. Further, even if the detector 61 mounted on the pulley 55 rotates to a position facing the rotation sensor 29, the blocking arm 65 is disposed therebetween, and the rotation sensor 29 cannot detect the magnetism of the detector 61.
9 outputs no pulse.

On the other hand, for example, by depressing the pedals 32a and 32b in the traveling direction, as shown in FIGS. 7 (e) and 7 (f),
When the pulley 55 rotates in the second direction B, the blocking arm 65 also rotates in the same direction by the action of the interlocking member 66, and the blocking arm 65 is positioned at the detection position shown in FIG. . This detection position is a position that does not face the rotation sensor 29. Also at this time, the interlocking member 6
Since 6 only connects the pulley 55 and the blocking arm 65 by a frictional force, the pulley 55 continues to rotate even if the blocking arm 65 is positioned. And pulley 5
When the detector 61 attached to the member 5 rotates to a position facing the rotation sensor 29, the rotation sensor 29 detects the magnetism of the detector 61 and outputs a pulse because the blocking arm 65 is not arranged therebetween. Therefore, it is possible to detect whether or not the cranks 35, 36 are rotating in the traveling direction by the pulse generated from the rotation sensor 29 of the rotation direction detecting device 60.

A rotation direction detecting device 60 having such a configuration
Can detect whether or not the cranks 35 and 36 are rotating in the traveling direction with one rotation sensor 29, so that a compact and simple configuration can be realized. Further, since it is sufficient to process the signal from one rotation sensor 29, the rotation directions of the cranks 35 and 36 can be detected by simple processing. <Operation> As an example of the shift control method of the shift control device 15, a shift control method of the rear exterior transmission device 9 will be described below with reference to a control flowchart shown in FIG. The shift control method of the front exterior transmission 8 is the same as the shift control method of the rear exterior transmission 9 except that the number of gears is small, and therefore the description thereof will be omitted.

When the rider turns on the power switch 25 of the shift control device 15, the shift control of the bicycle 1 becomes possible. As a result, first, in step S1, the shift control device 15 is initialized. Along with that, the memory 22
The contents stored in are initialized. For example, the shift speed SH is set to the second speed. Then, in step S2, the gear shift position sensor of the rear derailleur 42 fetches the current gear shift position and stores the value SH of the gear stage in the memory 22. SH is a count value for storing the value of the current gear stage, "1" when the current gear stage is 1,
In the case of the third gear, a numerical value such as "3" corresponding to the gear is stored. After being stored in SH, step S
Move to 3.

In step S3, it is determined whether or not an upshift request has been made. In the manual shift mode, this determination is based on the rear upper shift button 18 of the shift operating unit 14b.
It is determined whether or not b has been pressed and a shift-up signal has been output. Further, in the automatic shift mode, it is determined whether or not the vehicle speed exceeds a shift-up threshold value corresponding to each shift stage. In step S4, it is determined whether or not a downshift request is made. In the manual shift mode, this determination is made based on whether or not the rear lower shift button 19b of the shift operating unit 14b is pressed to output a shift down shift signal. Further, in the automatic shift mode, it is determined whether or not the vehicle speed has dropped below the shift-down threshold value corresponding to each shift stage. In step S5,
It is determined whether or not another processing request such as display or various settings has been made.

When an upshift request is made in step S3, the process proceeds from step S3 to step S6, and the crank 35,
It is determined whether 36 is rotating in the traveling direction. As described above, the rotation sensor 29 generates a pulse when the cranks 35 and 36 rotate in the traveling direction (second direction B), and does not generate a pulse in other cases, that is, in the first direction A and when stopped. .

In the case of the external transmissions 8 and 9, since the chain 7 is derailed from one sprocket to another sprocket to perform a gear shifting operation, the chain 7 rotates forward and the chain 7 rotates.
If there is no tension on the gear, the gear cannot be changed.
Therefore, in step S6, the rider operates the pedals 32a,
The shift operation is not performed when the pedal 32b is not stepped in the traveling direction. When the determination in step S6 is "No", the shift operation is not performed and the process proceeds to step S4. If it is determined in step S6 that the cranks 35, 36 are rotating in the traveling direction, the process proceeds to step S7. In step S7, the shift-up signal is sent to the connection unit 28.
Output to. The connection unit 28 outputs a drive signal to the rear derailleur 42 based on the shift-up signal. As a result, the rear derailleur 42 is shifted up by one speed.

When a downshift request is made in step S4, the process proceeds from step S4 to step S8, and whether the cranks 35 and 36 are rotating in the traveling direction by the pulse from the rotation sensor 29 as in step S6. Determine whether or not. If the determination in step S8 is "No", the shift operation is not performed and the process proceeds to step S5. If it is determined in step S8 that the cranks 35, 36 are rotating in the traveling direction, the process proceeds to step S9. Step S
At 9, the shift down signal is output to the connection unit 28. The connection unit 28 outputs a drive signal to the rear derailleur 42 based on the downshift signal. As a result, the rear derailleur 42 is shifted down by one step to the low speed side.

If another processing request is made, the process moves from step S5 to step S10 to perform the other requested processing. Here, the rotation sensor 2 is cut off by the blocking arm 65.
By making 9 undetectable, the rotation of the cranks 35, 36 in the traveling direction can be detected by the single rotation sensor 29, so that the detection device 60 can be realized with a compact and simple configuration. Further, since it is sufficient to process the signal from one rotation sensor 29, the rotation directions of the cranks 35 and 36 can be detected by simple processing.

Further, since the inexpensive and small reed switch which is turned on and off by magnetism is used as the non-contact sensor, the cost of the apparatus can be further reduced. Other Embodiments (a) In the above embodiment, the reed switch is used as the non-contact detecting means, but other non-contact detecting means such as a photoelectric switch may be used.

(B) In the above embodiment, the device of the present invention was used as an example of detecting the rotation direction of the crank of the bicycle, but the device of the present invention is used for detecting the rotation directions of all the rotating bodies. You can (C) In the above embodiment, the rotation direction is determined after the shift request, but the shift request may be determined after determining the rotation direction. In this case, as shown in FIG. 9, the crank rotation direction is determined in step S13, and only when the rotation direction is the traveling direction (only when the rotation sensor 29 emits a pulse), the shift is performed in steps S15 and S16. It is only necessary to determine the up request and the downshift request.

[0041]

According to the present invention, the non-contact detecting means is placed in the detectable state and the non-detectable state by the blocking body, so that the non-contact detecting means rotates the rotating body in the second direction. Can be detected, so that the detection device can be realized with a compact and simple structure. Further, since it is sufficient to process the signal from one non-contact detecting means, the rotation direction of the rotating body can be detected by a simple process.

[Brief description of drawings]

FIG. 1 is a side view of a bicycle equipped with a bicycle transmission according to the present invention.

FIG. 2 is a perspective view around the handle of the bicycle.

FIG. 3 is a control block diagram thereof.

FIG. 4 is a front view of a rear exterior transmission.

FIG. 5 is an enlarged partial view of the pulley portion.

FIG. 6 is a sectional view thereof.

FIG. 7 is a schematic diagram illustrating the operation of the rotation direction detection device.

FIG. 8 is a control flowchart thereof.

FIG. 9 is a view corresponding to FIG. 8 of another embodiment.

[Explanation of symbols]

29 Rotation sensor 35,36 cranks 52 Chain guide 55 pulley 60 Rotation direction detector 61 detector 62 Shutoff mechanism 65 Blocking arm 66 interlocking member 67 Positioning protrusion

Claims (6)

[Claims] 1. A rotation direction detecting device for detecting the rotation direction of a rotating body rotatably mounted on a fixed body, comprising: non-contact detecting means fixed to the fixed body; and non-contact detecting means. Is attached to the rotating body so that it can be detected, and the non-contact detecting means can separate the detector from the blocking position where the non-contact detecting means cannot detect the detector, and the non-contact detecting means can detect the detector. A blocking body movably mounted on the fixed body at a detection position, an interlocking means for moving the blocking body in association with rotation of the rotating body in a first direction and a second direction opposite thereto, and the interlocking means. A rotation direction detecting device comprising: a blocking means having a positioning means for positioning the blocking body moved by the blocking position and the detection position. 2. The rotation detecting device according to claim 1, wherein the fixed body is a bicycle-related component, and the rotating body rotates in conjunction with a crank of the bicycle. 3. The rotation direction detecting device according to claim 1, wherein the non-contact detecting means is a reed switch that is turned on and off by magnetism, and the detector is a magnet. 4. The rotation direction detecting device according to claim 3, wherein the blocking body blocks the magnetism emitted from the detector. 5. The blocking body is mounted on the fixed body so as to be rotatable about an axis of the rotating body, and the interlocking means connects the rotating body and the blocking body by a frictional force. 4. The rotation direction detection device according to any one of 4. 6. The rotation means, wherein the positioning means is provided on the fixed body, and the blocking body is arranged between the non-contact detection means and the detector when the rotation body rotates in the first direction. 6. The stopper member according to claim 1, which is a stopper member that positions the blocking body at a position of the blocking position, and positions the blocking body at the detection position when the rotating body rotates in the second direction. The rotation direction detection device described.